Round: 28 Ground: Hardcourt outdoor
| Challenger Winnetka DM | 2018/07/12 16:00 | Sell/Turini v Aragone/Giron | 3-6,4-6 |
| Challenger Winnetka DM | 2018/07/10 22:00 | Aragone/Giron v Chaplin/Saville | 6-3,6-3 |
| Challenger Winnetka DM | 2018/07/12 20:00 | Eubanks/Young v Maytin/Rungkat | 3-6,2-6 |